From wikipedia

“Along with the B-52 Stratofortress and B-1B, the U.S. military contends that the B-2 provides the penetrating flexibility and effectiveness inherent in manned bombers. Its low-observable, or “stealth,” characteristics give it the ability to penetrate an enemy’s most sophisticated defenses and threaten its most valued, and heavily defended targets. Its capability to thwart air defenses and threaten effective retaliation should provide a strong, effective deterrent and serious combat force well into the 21st century.”

While I was at wikipedia, I found a couple more images of this aircraft that simply kick ass…